[PATCH] ubifs: fix memory leak on error condition

[Garry McNulty]

If the call to ubifs_read_nnode() fails in ubifs_lpt_calc_hash() an
error is returned without freeing the memory allocated to 'buf'.
Jump to 'out' label to free allocated memory and return the error code.

Detected by CoverityScan, CID 1441025 ("Resource leak")

Signed-off-by: Garry McNulty <***@gmail.com>
---
fs/ubifs/lpt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c
index d1d5e96350dd..c162459a1e02 100644
--- a/fs/ubifs/lpt.c
+++ b/fs/ubifs/lpt.c
@@ -1688,7 +1688,7 @@ int ubifs_lpt_calc_hash(struct ubifs_info *c, u8 *hash)
if (!c->nroot) {
err = ubifs_read_nnode(c, NULL, 0);
if (err)
- return err;
+ goto out;
}

cnode = (struct ubifs_cnode *)c->nroot;

[Richard Weinberger]

Post by Garry McNulty
If the call to ubifs_read_nnode() fails in ubifs_lpt_calc_hash() an
error is returned without freeing the memory allocated to 'buf'.
Jump to 'out' label to free allocated memory and return the error code.
Detected by CoverityScan, CID 1441025 ("Resource leak")
---
fs/ubifs/lpt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c
index d1d5e96350dd..c162459a1e02 100644
--- a/fs/ubifs/lpt.c
+++ b/fs/ubifs/lpt.c
@@ -1688,7 +1688,7 @@ int ubifs_lpt_calc_hash(struct ubifs_info *c, u8 *hash)
if (!c->nroot) {
err = ubifs_read_nnode(c, NULL, 0);
if (err)
- return err;
+ goto out;
}
cnode = (struct ubifs_cnode *)c->nroot;

Please see:
http://lists.infradead.org/pipermail/linux-mtd/2018-October/085081.html

If Colin won't send a v2, please do you so, then I'll take your v2.

Thanks,
//richard

[Colin Ian King]

Post by Richard Weinberger

Post by Garry McNulty
If the call to ubifs_read_nnode() fails in ubifs_lpt_calc_hash() an
error is returned without freeing the memory allocated to 'buf'.
Jump to 'out' label to free allocated memory and return the error code.
Detected by CoverityScan, CID 1441025 ("Resource leak")
---
fs/ubifs/lpt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c
index d1d5e96350dd..c162459a1e02 100644
--- a/fs/ubifs/lpt.c
+++ b/fs/ubifs/lpt.c
@@ -1688,7 +1688,7 @@ int ubifs_lpt_calc_hash(struct ubifs_info *c, u8 *hash)
if (!c->nroot) {
err = ubifs_read_nnode(c, NULL, 0);
if (err)
- return err;
+ goto out;
}
cnode = (struct ubifs_cnode *)c->nroot;

http://lists.infradead.org/pipermail/linux-mtd/2018-October/085081.html
If Colin won't send a v2, please do you so, then I'll take your v2.

Please take Garry's V2, sorry, I somehow overlooked doing a V2.

Post by Richard Weinberger
Thanks,
//richard